Extech Instruments Heavy Duty Light Meter with PC Interface Underground Location Systems there is also an option

there is also an option to configure the instrument to record particle counts

Carbon equivalent for welding

This handy pocket-sized meter provides fast and accurate spot-checks of relative humidity and temperature

which can alter samples and ruin the pumps

Fuel gauge incorporated for at a glance fuel monitoring

Extech Instruments Heavy Duty Light Meter with PC Interface Underground Location Systems there is also an optionLight meter with four lighting types Tungsten Daylight, Fluorescent, Sodium, and Mercury. This light meter offers selectable lighting types, data record recall, relative display mode, and PC interface. This professional meter, with proper care, will provide years of safe reliable service.